Greater London · London and the South East
Electronic leak detection in Hanwell, Greater London
Electronic leak detection to pinpoint holes in flat roof membranes around Hanwell, with findings in writing and pictures to back them up. Book a weekday or weekend visit.
- Breaches hidden under paving or planting
- Leaking laps in the waterproofing
- Breaches around outlets and penetrations
Electronic leak detection in Hanwell: what you get
ELD is a way of pinpointing breaches in a flat roof’s waterproofing membrane. It works with an electrical current that passes through the membrane only where there’s a breach. It can find holes too small to spot by eye, so your roofer can repair them. You get a photo-illustrated written report of each breach found. Common reasons to book are repairs that haven’t stopped the leak and damp inside with no sign on the roof, on single-ply roofs, liquid-applied waterproofing and roof terraces and balconies.
London has a lot of flat roofs: rear additions, dormers, roof terraces and the roofs of blocks and offices. Coverings range from felt and asphalt to EPDM rubber, GRP fibreglass and single-ply membranes, each with its own weak points. Which one is on a roof in Hanwell shapes how it’s checked. Many older flat roofs are felt or asphalt, and many newer ones EPDM rubber or GRP.
What you get is a clear record of the flat roof membrane on the day we saw it. That makes it useful now and a handy reference later, like when you want to compare after future work.
- Place
- Hanwell (W7, W13, UB2)
- Region
- Greater London
- Cost
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- When we survey
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
What happens if roof problems are left?
Chasing a leak again and again is frustrating. A report showing the breach points gives your roofer a clear target. Any roof job in Hanwell means planning around parking, neighbours and access. That is a good reason to find problems early, while there’s time to plan, rather than in a rush after a leak.
The cost of a survey depends on the roof: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. Electronic leak detection is quoted for your roof, because the method depends on the roof.
Why book with us
- Drone and thermal imaging surveys available
- Visits on any day of the week
- Over 5,000 surveys carried out
- Independent findings on the roof’s condition
See how roof surveys are priced or what we found on two real jobs.
Nearby places to Hanwell
More services for Hanwell
Flat and commercial roofs around Hanwell
Outer London has plenty of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, frequently with hipped roofs in clay or concrete tiles. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. Mixed in with those pitched roofs are a good many flat ones, over rear extensions, dormers, garages and shops. There are several hotels within about a mile and a half of Hanwell, and hotels, like offices and blocks of flats, often have flat roofs. If you look after one, a leak through a flat roof can put a room out of use.
If your home is one of the older ones in the streets near Church of St Mellitus, flat-roofed rear additions and dormers added over the years are worth checking. For site and facilities teams at buildings such as St Joseph's Catholic Primary School, a large flat roof with plenty of outlets and rooflights has many places where a membrane can fail. If you own a rental within reach of Hanwell station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Hanwell is about 1 mile west of Ealing, in Greater London. Hanwell is one of many places we visit across Greater London. Our area takes in places right across Greater London, from the larger towns to small villages. For surveys nearby, see our London page.
Every address in W7, W13 and UB2 is covered for electronic leak detection, from the main roads to the quietest streets. If you need electronic leak detection at a property on Park Road, Green Lane and Felix Road or anywhere close by, we can survey it. Hanwell is on the A4001, which makes it straightforward to reach. Nearby, we also carry out electronic leak detection in West Ealing (1 mile west), Ealing (1 mile east), Dormers Wells (1 mile north-west), South Ealing (1 mile south-east) and Pitshanger (2 miles north-east). Further out, we also cover London (10 miles east), City of Westminster (8 miles east), Marylebone (8 miles east), Kensington (6 miles east), St Pancras (10 miles east) and Shoreditch (11 miles east).
Local landmarks in Hanwell
Locally, jobs take us to homes and businesses close to Drayton Manor High School, Cuckoo Schools and Drayton Green and the streets around them. There’s a railway station in Hanwell itself: Hanwell station. Well-known places in the area include Ealing Hospital (under half a mile west) and Gunnersbury Park House - Large Mansion (2.3 miles east). The countryside around Hanwell includes Middle Lake and Castlebar Hill.
Honest limits
Our findings are based on what we can see safely on the day, so some things are outside what a survey can do:
- Repairing the breaches (that is for your roofer)
- Some conductive membranes
- Water entering through details rather than the membrane
Not sure which survey suits your roof? You can phone 07833 053749 or drop us an email and we will tell you. What our survey covers.
What this survey covers
- Roof terraces and balconies
- Liquid-applied waterproofing
- Commercial flat roofs
- Green roofs
- Flat roof membranes
- Single-ply roofs
The survey, step by step
Time on site depends on the size and shape of the roof; as a rough guide, the survey takes a length of time set by the roof’s area and construction, which we set out in the quote. You are welcome to ask questions while we’re there. For a visit in Hanwell, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. On the day, the roof is looked at from the ground, from windows, from inside the roof space and from the roof where it’s safe.
- You tell us about the roof and where water is showing.
- We check whether the membrane and build-up suit ELD.
- The test method is chosen to suit the roof.
- We test the roof and locate any breaches.
- You get a report with photos of each breach.
Before the survey
- Clear the way to the loft hatch
- Unlock side gates and any roof access doors
- Keep pets inside or away from the areas we’re looking at
Getting a price
We confirm the exact price before booking, so you know the cost up front. Electronic leak detection is quoted for your roof, because the method depends on the roof. For a price for your roof, ring 07833 053749 or use the contact form.
Advice
Prices for electronic leak detection in Hanwell
Every roof is different, so prices are confirmed before you book. This is what makes a difference:
- Chimneys, valleys, parapets and other details
- The size of the roof
- Extra roofs, like extensions, dormers or garages
- How tall the building is and how easy the roof is to see
To find out what your survey will cost, phone 07833 053749 or email us with the address and some details. We will confirm the figure before booking.
Getting in touch
If you can, have these to hand when you get in touch:
- Dates you are working to, such as exchange
- The type of building and roof, like pitched or flat
- What’s prompted the survey
- Pictures of the roof from a safe spot, if you have them
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, phone 07833 053749 or email us.
Checking the roof from ground level
After heavy rain, check ceilings and the tops of walls for new stains. Photograph them and note the date, as it helps a surveyor trace the cause.
After strong wind, take a look from the pavement or garden: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Leave anything above ground level to a survey.
Different roofs, different checks
Single-ply membranes
Many offices and units have single-ply roofs. Laps and fixings are where holes often appear.
Inverted and paved roofs
On inverted roofs, insulation sits above the membrane and that changes how testing works.
FAQs for Hanwell
How do I find out if my home in Hanwell is listed?
Your council is the best source, with Historic England’s list for listed buildings. Both listing and conservation areas can limit changes of roofing material.
Will parking be an issue for a roof survey in Hanwell?
It rarely stops a survey, but it is worth planning. Let us know the parking rules on your street and we will work around them.
Do you look in the loft space?
If it’s needed and safe to reach, yes. Inside, we look for damp, staining, gaps and sagging, as far as the space allows.
Can you survey in bad weather?
It can, depending on the survey. Drone flights need calm, dry weather, and thermal imaging works best with a dry roof, little wind and a sunny day beforehand. We will rearrange with you if the weather is not right.
Can you test a green or ballasted roof?
Sometimes. It depends on the build-up and the layers above the membrane, and some may need lifting. We talk this through first.
Is my roof suitable for ELD?
It depends on the membrane and the build-up. Tell us what you know about the roof and we will confirm suitability.
Is the repair part of the test?
No, the test finds the breaches and your roofer repairs them. The report gives your roofer the locations.